20952453 has 4 divisors (see below), whose sum is σ = 27936608. Its totient is φ = 13968300.

The previous prime is 20952433. The next prime is 20952457. The reversal of 20952453 is 35425902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-20952453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20952453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20952457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3492073 + ... + 3492078.

It is an arithmetic number, because the mean of its divisors is an integer number (6984152).

Almost surely, 2^20952453 is an apocalyptic number.

It is an amenable number.

20952453 is a deficient number, since it is larger than the sum of its proper divisors (6984155).

20952453 is an equidigital number, since it uses as much as digits as its factorization.

20952453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6984154.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 20952453 is about 4577.3849521315. The cubic root of 20952453 is about 275.6840403447.

The spelling of 20952453 in words is "twenty million, nine hundred fifty-two thousand, four hundred fifty-three".